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Shading composition

a composition and composition technology, applied in the direction of detergent dyes, naphthalene azine dyes, detergent compounding agents, etc., can solve the problems of poor deposition of acid azine dyes on polycotton, and poor deposition of acid azine dyes on polyester garments, etc., to achieve good deposition stability, good deposition stability, and good deposition stability

Active Publication Date: 2013-05-14
CONOPCO INC D B A UNILEVER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes how certain types of dye can be used to improve the whiteness and quality of fabrics made from cotton. These dyes are absorbed well by the fabric and are stable in alkaline conditions. They also result in a fabric with less dullness and no-build up over time.

Problems solved by technology

Acid azine dyes deposit poorly to polyester-cotton blended garments and provide no deposition to polyester garments.
The poor deposition on polycotton is thought to be due to the low cotton content of these garments.

Method used

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  • Shading composition
  • Shading composition
  • Shading composition

Examples

Experimental program
Comparison scheme
Effect test

example 1

Comparison of Dulling Properties

[0091]Woven Cotton and polycotton fabrics were washed in an aqueous wash solution (demineralised water) containing 1 g / L Linear Alkyl benzene sulfonate, 1 g / L sodium carbonate and 1 g / L sodium chloride at a liquor to cloth ratio of 30:1. To the wash solution shading were added such that the optical density (5 cm) at the maximum optical absorption in the range 400-750 nm was 0.1. After 30 minutes of agitation the clothes were removed rinsed and dried. After the wash the reflectance spectra measured on a reflectometer and the colour expressed as CIE L* a* b* values, and the whiteness expressed as the Ganz value.

[0092]The dulling of the cloth was expressed as the total colour deposited on the cloth given by the ΔE value:

ΔE=[(Lc−Ld)2+(ac−ad)+(bc−bd)2]0.5

[0093]Where Lc, ac, and bc are the CIE L a b values of the control cloths washed without dye

[0094]And Ld, ad, and bd are the are the CIE L a b values of the cloths washed with dye.

[0095]The increased in w...

example 2

Comparison of Whitening Properties on Fabrics

[0100]Comparison of the ΔGanz values from experiment 1 showed that dye 6 gives a good whiteness increase to polycotton and cotton, unlike dye 1. This occurs because of great dye deposition to polycotton for dye 18, dye 20 and dye 24.

[0101]

ΔGanz(cottons)ΔGanz(polycottons)Dye 1*225Dye 182316Dye 201411Dye 241012*comparative

Exemplary Base Powder Formulations A, B, C and D

[0102]

FormulationABCDNaLAS15201014NI(7EO)———10Na—15——tripolyphosphateSoap———2Zeolite A247——17Sodium silicate5451Sodium carbonate25203020Sodium sulphate40334022Carboxymethyl-0.20.3—0.5celluloseSodium chloride———5Lipase0.0050.01—0.005Protease0.0050.01—0.005Amylase0.0010.003——Cellulase—0.003——Acid Violet 500.00150.002——Direct violet 90.0001———Disperse violet 28—0.0002—0.0001cationic azine dye0.00150.0020.0020.003Fluorescer0.10.150.050.3Water / impurities / remainderremainderremainderremainderminors

[0103]The powder formulations A, B, C and D were made up with dye 18, dye 20 and dye 2...

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Abstract

The present invention provides a laundry treatment composition comprising a cationic azine dye.

Description

FIELD OF INVENTION[0001]The present invention relates to the delivery of dyes to fabrics.BACKGROUND OF THE INVENTION[0002]Many white garments are created from either pure cotton or polyester cotton blends. Polyester cotton blends typically contain greater than 60% polyester. To enhance whiteness shading dyes may be included in domestic wash products that deposit onto fabrics to counter-act yellowing and greying of the fabric. WO 2008 / 017570 (Unilever) discloses the use of acid azine dyes as shading agents for domestic wash product. Acid azine dyes carry negatively charges substituents making the net charge of the dye anionic. Acid azine dyes deposit onto cotton but do not build up over multiple washes, preventing overblueing. Acid azine dyes deposit poorly to polyester-cotton blended garments and provide no deposition to polyester garments. The poor deposition on polycotton is thought to be due to the low cotton content of these garments. A shading system is required which give good...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): C11D3/40C09B17/04C09B17/02C11D3/42
CPCC11D3/40C11D3/42C09B17/00
Inventor BATCHELOR, STEPHEN NORMANBIRD, JAYNE MICHELLE
Owner CONOPCO INC D B A UNILEVER